Septic-tank structure



1930. l. GUTMAN ETAL SEPTIC TANK STRUCTURE Filed Dec. 21, 1928 3 Sheets-Sheet l INVENTOR,

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Til-l .llvll ll Jan. 7, 1930. l 1. GUTMAN ET AL SEPTIC TANK STRUCTURE s Sheets-Sheet 2 Filed Dec. 21, 1928 8 R O T N E V m Jan. 7, 1930. GUTMAN ET AL 1,742,911

SEPTIC TANK STRUCTURE INVENTORG Patented Jan. 7, 1930 UNITED STATES PATENT OFFICE IRWIN GUTMAN AND GEORGE E. EVANS, F PITTSBURGH, PENNSYLVANIA SEPTIC-TANK STRUCTURE Application filed December 21, 1928. Serial No. 327,675.

Our invention relates to cover and baffle structures or hoods for septic tanks, grease traps, etc.

One object of our invention is to provide in septic tank structures for sewage disposal a cover or drum of such form that it will serve, in combination with sewer tile or the like, as a complete septic tank unit.

Another object of our invention is to provide a sanitary tank attachment which may be conveniently applied to standard sewer tile or concrete pipe, without alteration of the tile or pipe and wherein the baffles are formed unitarily with the cover.

Another object of our invention is to pro vide a unitary cover oredrum for two septic tank receptacles.

Still another object of our invention is to simplify and improve generally upon septic tank structures.

Some of the forms which our invention may take are shown in the accompanying drawing, wherein Figure 1 is a plan view, partially in section of a double type tank structure; Fig. 2 is a view, partially in side elevation and partially in section, of the apparatus 01" Fig. 1; Fig. 3 is a view similar to Fig. 1, but showing a modified form of device Fig. 4; is a View, partially in elevation and partially in section, of the structure of Fig. 3 Fig. 5 is a view taken on the line VV of Fig. 4; Fig. 6 is a plan view of another form of drum or cover; Fig. 7 is a view of the device of 6, partially in elevation and partially in section; Fig. 8 is a plan view partially in section of a tank structure wherein one receptacle will serve both as asludge chamber and as an effluent chamber Fig. 9 is an elevation al sectional view of the structure of Fig. 8, and Fig. 10 is a fragmentary view showing the manner in which the baffles of Figs. 8 and 9 and certain of the other figures may be attached to the drum.

Referring to Figs. 1 and 2, we show a uni- 1 tary cover structure which serves for both a 11 and 12 may be standard tile or concrete sections of any suitable dimensions.

In order to avoid the necessity of forming baliles in the chambers 11 and 12 and of providing fiow passages through the walls thereof, we provide a cover structure 13 therefor which may consist of sheet metal plates welded or otherwise suitably secured together, and is composed of two drum-like portions which are open at their lower ends and fit within the belled or hub ends of the chambers 11 and 12. WVaterproof .plastic material or cement may be introduced to effect fluid tight joints as indicated at 14. A pairof baflies 15 and 16 are welded or otherwise secured to the vertical wall of one of the drum portions, and battles l7 and 18 are mounted in the other drum. Liquid passages 19, and 21 are provided for conducting the sewage through the system. These passages are shown as welded to the drums.

It will be seen thatliquid will enter the sludge chamber 11 through the conduit 19, will flow beneath the baflie 15, and beneath the 7 lower edge of the baffle 16, thence through the conduit 20 and pastthe bafiies 17 and 18-to the outlet conduit 21. The bafiies are positioned in a well-known manner so that sludge will form and bacteria will be permitted to act upon the solid particles of the sewage to liquety the same during the time it remains in the receptacles or tanks, the upper ends ofthe baffles being at such height with respect to the conduits 20 and 21 that nofree flow of liquid will occur through the system.

The making of the cover or drums in the form' of a metallic unitary structure possesses a number of advantages such as permitting shipping and handling of the cover without danger of breakage, permitting convenient installation thereof, without especially forming the tank bodies and without. cutting or chipping such bodies, insuring properinstallation of thesystem by even unskilled workmen, etc. Furthermore, the

cover and its baflles can bereadily removed 7 from the receptacles, for the purpose of cleaning out the system. c

In Figs. 3 .to 5, we show a structure having somewhat the characteristics of the device of Figs. 1 and 2, but wherein the top wall 23 of the drums 24 and 25 is stamped from sheet metal with win portions 26 as indicated by dotted lines in Fig. 3. These wing portions are bent downwardly to the form shown in Figs. 4 and 5 with their edges welded to the adjacent sides of the drums 24 and 25 to form' a connecting conduit for such drums. The adjacent portions o'fthe drum -wallsare'cutaway as indicated at 27 to permit. flow through the conduit 7 26..

Another feature of distinction, as compared tov the structure of Figs. 1'jand'2; re;-

sides in the manner in which the baflles 28 which correspond to the baffles 1 5, 16,17 and 18are fastened to the drums. These baiiles are provided with tongues "29 as shown more clearly in Fi 10, and the tonguesextend through slots in the wall of the drum and are then bent back so that they will be securely held in position. The'atta chment of the baf fles as shown'in Figs. 3,4 and 10 is similar and cheaper than the operation ofwelding them' in place as shown 'n'Fig. 11'. w

'Figs. 6 and 7' show a st ucture wherein baf fies 30 are formed striking them down from the 'top 31" (lithe drum'and bending them to the form shown, so that their vertical edges will abut against'the inner vertical wall of the drum; The generally rectangular space left within the top plate 31 through the striking down of th m-ans members is closed by a lid 32 which may be held in place by screws orjboltsandfwhich will also aflord convenient access to the interior of the tank 7 for thepurpose of cleaningthe same.

Figs. 8 and 9 show a strueture wherein a single receptacle may be employed to servethe purposeof the double receptacle arrangementof Figs. 1 to Q4. Inthis structure, baffles 34' and 35, are mounted inposition substantially as shown in Fig. 10, or in any other suitable mannen In this structure, the bafile 34 prevents excessive churning and stirring up of the bodyofliquidby the sewage as it enters the receptacle, as does the bafile l5 ofFig. 2, while'thefbafile 35 functions to prevent astraight away flow the receptacle.

The necessity of two receptaclesis avoided by reason lofa partition plate 36 which may be welded to the lid 37 or to the inner wallof thedrum 38. The partition i36..has a cut-out portion 39 so that abacteria mat or scum may be formed above the spaces atthe sides of the partition. .The lid=37 is shown as detachably held in place by means of threaded studs 40, which are weldedto the drum, and means'ofnuts 41.

While the-structure is hereinafter claimed as aseptic tankdevice, it willbe u derstood thafsuchdes'ignation is given merely asa matterof convenience and that the structure is capable o tuseinvarious other relations as teiarilie w sdibild meya sab us d to covering in thehood and a covering portion forlan efiluent chamber. and means permitting flow of liquid past said diyiding neans.

' 2. A' septic madame comprising two unitarily formed hood-like portions and each portion adapted to seat upon a receptacle, a conduit connecting said hood portions, and baflle members disposed within the hood Portions.

In testimony whereof we, the said IRWIN GUTMAN and GEORGE set our hands;

i IRWIN GrUTMAN.

GEORGE, E.EVANS.

E. EvANs have hereun- 

